The Adventures of Barry McKenzie [1972 feature film]

This feature film of the Private Eye comic strip the titular
Aussie-in-London mistaking "Barons Court" station for a cinema, with its
naming being the title of the film showing and the "Underground" sign as
an indicator of the genre! Once inside, though, he realises his mistake.
The exteriors are the reach "Barons Court" station, but the platform and
train were shot at "Waterloo" on the Waterloo & City line during its
days of British Rail ownership. In images 5 & 6, a train is seen leaving
in the platform in the direction of "Bank," while in image 8 another is seen
coming out of the depot. In image 7, McKenzie (Barry Crocker) and Lesley
(Mary Ann Severne) have just come onto the platform via the entrance at the
bottom of the long ramp down from the lower concourse and ticket hall level.